Means for attaching an artificial tooth to a backing or bridge plate.



H. D. MORGAN. MEANS FOR ATTACHING AN ARTIFICIAL TOOTH TO A BACKING 0RBRIDGE PLATE.

APPLICATION FILED IUNE SO. 19H.

. Patented Apr. 2, 1918..

2 SHEETS-SHEET I- TEL :12.

m N B INVENTOR Ha /z HMO/ 9072 WITNESSES I ATTORNEYS H. 0. MORGAN.

MEANS FOR ATTACHING AN ARTIFICIAL TOOTH TO A BACKING 0R BRIDGE PLATE.APPLICATION FILED JUNE 30. 1917.

Patented Apr. 2, 1918..

2 SHEETS SHEET 2- WITNESSES u Rd HUGH D. MGRGAN, 0F YOUNGSTQWN, 03-119.

MEANS FOR ATTACHING AN ARTIFICIAL TOOTH TO A BACKENG 0R BRIDGE PLATE.

Specification of Iietters Patent.

Patented Apr. 2,

Application filed June 30, 1917. Serial No. 177,92

To aZZ whom it may concern:

Be it known that I, HUGH D. MORGAN, a citizen of the United States, anda resident of Youngstown, in the county of Mahoning and State of Ohio,have invented a new and lniproved Means for Attaching an ArtificialTooth to a Backing or Bridge Plate, of which-the following is a full,clear, and exact description.

My invention has for its objectto provide an artificial tooth with a pinor pins having heads the sides of which diverge outwardly from theartificial tooth, the pins being adapted to be disposed in slots in thebacking or bridge plate, the sides of the said slots converging from thecutting edge of the backing or bridge plate, and being under-cut topermit the insertion of the heads of the pins in the slots adjacent thecutting edge and the movement of the artificial tooth into place, theheads of the pins being wedged between the converging sides of the slotsduring this movement, and the artificial tooth being raised over a tipof the backing or bridge plate at its cutting edge, the said tipprotecting the biting edge of the artificial tooth and serving to assistin preventing the outward movement of the artificial tooth.

Additional objects of the invention will appear in the followingspecification in which the preferred form of the invention is disclosed.1

In the drawings similar reference characters denote similar parts in allthe views, in which Figure l is an elevation showing an artificial toothsecured to the backing;

Fig. 2 is a view showing the front face of the backing or bridge plate,the pin being illustrated in section;

' Fig. 3 is a sectional view on the line 33 of Fig. 1;

Fig. 4' is a sectional view on the line H of Fig. l;

Figs. 5 and 6 are views showing a modified form of the invention;

Figs. 7, 8 and 9 are sectional views showing how a replacement may bemade regardless of the" length of the tooth; and

Fig. 10 is a sectional view showing a modified form of the invention.

By referring to the drawings, it will be seen that a backing or bridgeplate l0 is provided with a slot 11, the sides of which are under-cut asshown by the dotted lines of the slot 11.

ing provided with a. pin 16 which is baked in the facing or artificial.tooth, the said pin 16 having a head 17 the sides of which divergeoutwardly so that the head l7 will fit the under-cut portions of thesides of the slot 11 in the backing or bridge plate 10.

lhe facing or artificial tooth 15 is secured to the backing or bridgeplate 10 by posing the artificial tooth or facing 15 in the positionindicated bythe dotted lines in Fig. 4 of the drawings, and with thehead 1'2 of the pin 16 disposed in the slot 11 at its widest end. Inthis position the hack of the facing or artificial tooth 15 restsagainst the hacking or bridge plate 10 adjacent its cutting edge 13. Thefacing or artificial tooth 15 is then moved to the position shown by thefull lines in of the drawings, and the head 17 of the pin 16 is wedgedbetween the converging sides When the pin head 17 is wedged in thisposition, the biting edge 14 of the facing-or artificial teeth 15 restsagainst the forwardly disposed portion of the backing or bridge plate 10adjacent its cutting edge.

It will be understood that if desired two of the said slots 11 may bemade in the backing or brid e late 10 and two pins 16, each with a hea 1may be baked in the facing or artificial tooth 15; but whether or not apluralityof slots and pins are employed, the facing or artificial tooth15 is attached to the backing or bridge plate 10 by the insertion of theheads of the pins in the slots adjacent the cutting edge of the backingor bridge plate, and by inovlid pin, Fig. 9 shows a small tooth with alarge pin the selection of the pins the movement of the teeth relativelyto the backing is limited as desired for locking purposes,

In Fig. 10 there is shown a modified form of the invention, in which thesides of the uudercutslot IO are parallel. In this construction liquidcement is employed to assist in holding the facing place.

Inasmuch both the backing and the pin are constructed of metal anall-metal back is provided Having thus described my invention, I claimas new and desire to secure by Let ters Patent:

1. In a means for attaching an artificial tooth to a backing or bridgeplate, a backin g having a cutting edge, a slot in its face withundercut sides which Converge away from its cutting edge, an artificialtooth havin a pin with a head of less width than the 'Wldlill of theouter side of the ,slot at its outer end adjacent the cutting edge, butgreaterthan the width of the outer side of the slotat inner end, and ashoulder extending forwai dly at the cutting edge of the backing overwhich the facing may be disposed to insert the head of the pin in theouter end of the slot, the shoulder serving to assist in hc'slding thefacing in normal 2 on with the head the in at the said inner end of theslot when the facing has for attaching an artificial tooth to backing orbridge plate, a backing having a cutting edge, a slot with undercutsides which converge away from the cutting edge, the under surfaces oftie said sides meme? converging outwardly, a facing and a pin on thefacing having a head the sides of which diverge outwardly to fit theundercut sides of the backing.

3. In a means for attaching an artificial tooth to a backing or bridgeplate, a backing having a cutting edge, a slot with undercut sides whichconverge away from the cutting edge, the under surfaces of the saidsides converging outwardly, a facing, a pin on the facing having a headthe sides of which diverge outwardly to fit the undercut sides of thebacking, the head of the pin being greater in width than. the outerwidth of the slot at a point spaced from the cutting edge, and ashoulder extending outwardly at the cutting edge of the backing andwhich assists in holding the facing with the head of its pin at the saidpoint.

4. In a means for attaching an artificial tooth to a backing or bridgeplate, a backing having a cutting edge, there being a slot in the faceof the backing with undercut sides which converge-away from the cuttingedge, an artificial tooth having a pin with a head of less width thanthe width of the outer side, of the slot at its outer end adjacent thecutting edge but greater than the width of the outer side of the slot atits inner end, the artificial tooth being normally disposed with thehead of its pin in the inner end of the slot.

5. In a means for attaching an artificial tooth to a backing or bridgeplate, a backing having a cutting edge, there being a slot in the faceof the backing with-undercut sides, the width of the outer side of theslot at its outer end adjacent the cutting edge being greater than thewidth of the outer side of the slot at its inner end, an artificialtooth havin a in with a head of less width than t e wldth of the outerside of the slot at its outer end adjacent the cutting edge but greaterthan the width of the outer side of the slot at its inner end, theartificial tooth being normally disposed against the face of the backingwith the head of its pin disposed in the inner end of the slot.

HUGH I). MORGAN.

